Use rest server simulation query to estimate gas

[ethanfrey]

There is some way for a query to do a dry run and return expected gas needed. This is used by the wasmdcli

Not high priority but it would be a nice feature

[faboweb]

From my experience, the gas simulation doesn't work and usually needs a high factor to not cause some txs to run out of gas.

[webmaster128]

From my experience, the gas simulation doesn't work and usually needs a high factor to not cause some txs to run out of gas.

Thank you for sharing. What's Lunie's strategy to set gas values?

[faboweb]

We use high fixed values for the gas estimate and adjust the gas price to not cause mega high fees.

[ethanfrey]

Thanks for chiming in @faboweb This is indeed the experience with many other apps. Simulate doesn't really simulate it all too well :(

I made this comment, hoping to improve the case for launchpad cosmos/cosmos-sdk#6522 (comment) but it looks like it was tentatively rejected cosmos/cosmos-sdk#6522 (comment)

That said, they did decide to make launchpad 0.39, so maybe there is the chance to get the improved simulation estimate inside the launchpad release so it makes sense

[ethanfrey]

This seems a key issue that would lead to better estimates: cosmos/cosmos-sdk#4938

at the very least we should explore if this is actually a feasible approach for 0.38. Being that this is pretty trivial to implement and becoming more of a huge burden for clients, I think we should get this in for 0.38.
(cosmos/cosmos-sdk#4938 (comment))

🤞

Anyone else want to nudge on the issue?

[webmaster128]

This is now tracked in #828